Shared Flashcard Set

Details

Final Exam
Review Sheet
72
Microbiology
Graduate
04/23/2013

Additional Microbiology Flashcards

 


 

Cards

Term
Blastomyces dermatitidis in tissue
Definition
thick walled yeast with broad based budding
Term
Coccoidiodes immitis in tissue
Definition
non-budding, thick walled spherule which contains non- budding endospores
Term
Histoplasma capsulatum in tissue
Definition
small yeast seen in bone marrow
Term
Paracoccidiodes brasiliensis in tissue
Definition
large, oval budding yeast
Term
Sporothrix schenkii in tissue
Definition
cigar-shaped yeast cells
Term
Penicillium marneffei in tissue
Definition
small yeast, non-budding with cross walls
Term
Blastomyces dermatitidis as mold
Definition
front is white to brown, reverse is tan, septate hyphae with pear shaped conidia
Term
Coccoidiodes immitis as mold
Definition
front is white to brown, reverse is white/gray, septate branched hyphae with barrel shaped arthroconidia alternating with empty cells
Term
Histoplasma capsulatum as mold
Definition
front is pink/white, reverse is white to orange/yellow, septate hyphae with pear-shaped tuberculate macroconidia
Term
Paracoccidiodes brasiliensis as mold
Definition
front is white, glabrous, heaped and brown, septate hyphae with intercalary and terminal chlamydospores and microconidia
Term
Sporothrix schenkii as mold
Definition
cigar-wrinkled, tan, black, thin septate hyphae with delicate roses
Term
Penicillium marneffei as mold
Definition
reddish brown with a blue center, reverse is red
Term
List 4 species of Trichophyton
Definition
Trichophyton mentagrophytes, Trichophyton rubrum, Trichophyton tonsurans, and Trichophyton schoenleini
Term
Characteristic of all Trichophyton
Definition
all dermatophytes with septate hyphae, thin-walled, smooth macroconidia and numerous microconidia
Term
Trichophyton mentagrophytes morphologic characteristics
Definition
coiled spirals, cigar macroconidia, and round microconidia on branched conidiophores
Term
Trichophyton rubrum morphologic characteristics
Definition
small tear drop microconidia borne laterally on hyphae
Term
Trichophyton tonsurans morphologic characteristics
Definition
- spirals and arthroconidia, balloon microconidia
Term
Trichophyton schoenleini morphologic characteristics
Definition
antler-like branches, numerous chlamydioconidia
Term
3 species of Microsporum
Definition
Microsporum audouinii, Microsporum canis, Microsporum gypseum
Term
characteristic of Microsporum
Definition
- all dermatophytes with septate hyphae and thick-walled tough macroconidia
Term
Microsporum audouinii morphologic characteristics
Definition
pointed terminal chlamyoconidia, pectinate hyphae, poorly shaped macroconidia
Term
Microsporum canis morphologic characteristics
Definition
- spindle-shaped macroconidia, knob like ends, club shaped sparse microconidia
Term
Microsporum gypseum morphologic characteristics
Definition
numerous, rough macroconidia with round ends and thin walls with > 6 walls
Term
Epidermophyton floccosum morphologic characteristics
Definition
thin and thick walled, smooth macroconidia, no microconidia, club shaped macroconidia thin and thin in clusters
Term
Penicillium
Definition
conidiophores branch into a brush
Term
Scopulariopsis
Definition
short and simple conidiophores with annellides that bear conidia which are thick walled, lemon shaped and cut off at base
Term
Acremonium
Definition
delicate septate hyphae with erect phialides, oblong conidia in clusters at the tip of the phialides
Term
Paecilomyces
Definition
phialides are elongated and taper into tenpins which bend away from the conidiophore, elliptical conidia in unbranched chains
Term
Gliocladium
Definition
conidiophores with brush-like phialides, conidia do not chain, they clump into clusters
Term
Trichoderma
Definition
short and branched conidiophores, with flask-shaped phialides and round cell conidia clustered at the end of the phialides
Term
Fusarium
Definition
(1) short conidiophores with 1-2 cell conidia in clusters or (2) branched/unbranched conidiophores bearing large sickle shaped multiseptate macroconidia
Term
Alternaria
Definition
dematiacious mold with dark hyphae, septated conidiophores that zigzag, brown, club-shaped conidia with transverse AND longitudinal septa
Term
Phialophora
Definition
dematiacious mold, slow growing, brown, branched, septate phialides, vase-shaped with flared cup-like collerette, round-oval conidia that accumulate at apex of the phialides
Term
Bipolaris
Definition
dematiacious mold with bent conidiophores, brown, thick, walled, oblong conidia with cylindrical septations and protruding hilum
Term
Exophiala
Definition
dematiacious mold, slow growing, yeast-like budding cells, septate hyphae with slender annellides that taper, oval conidia that cluster along the sides of the annellides
Term
Cladosporum
Definition
dematiacious mold with branched conidiophores with 2 branching single celled conidia, brown, oval, dark with dark hila
Term
Curvularia
Definition
dematiacious mold with bent conidiophores, 4 chambers in conidia with dark cell center and bent/curved conidia with age
Term
Aspergillus fumigatus
Definition
conidiophores are short and smooth, terminate in swollen vesicle with uniseriate phialides on 2/3 upper portion of the vesicle which is parallel to the axis of the conidiophore
Term
Aspergillus niger
Definition
conidiophores are rough, variable length, pitted and spiny, terminate in swollen vesicle with biserate phialides that cover the entire vesicle and radiate from head with black conidia
Term
Exerophilum
Definition
dematiacious mold with bent conidiophores, brown, long, thick walled conidia with 7-11 septations, conspicuous spare hilum
Term
Scedosporium
Definition
septate hyaline molds with single conidia, conidiophores with oval, truncated conidia
Term
Pseudoallescheria
Definition
cleistothecium is large, round and closed, dematiacious mold
Term
Annellides
Definition
a cell that produces and extrudes conidia; tapers and lengthens with each condidum
Term
Phialides
Definition
a cell that produces and extrudes conidia; does not taper or lengthen with each condidum
Term
Chlamydospores
Definition
thick-walled big resting spore of several kinds of fungi. It is the life-stage which survives in unfavourable conditions, such as dry or hot seasons.
Term
Arthroconidia
Definition
An asexual spore formed by the breaking of hyphae at the point of septation
Term
Rhizoids
Definition
a filamentous structure of fungi that extends into the substrate
Term
Ascospores
Definition
sexually produced fungal spore formed within an ascus
Term
Ostioles
Definition
A small pore through which spores are discharged
Term
Germ Tube
Definition
tubelike process, produced by germinating spore that develops into mycelium
Term
Psuedohyphae
Definition
: A chain of easily disrupted fungal cells that is intermediate between a chain of budding cells and a true hypha, marked by constrictions rather than septa at the junctions.
Term
Sporangium
Definition
a closed sac-like structure in which asexual spores are formed by cleavage
Term
Dimorphic
Definition
fungi with both a mold phase and a yeast phase
Term
Dematiaceous
Definition
presence of pigmentation in fungal hyphae or spores
Term
Dermatophyte
Definition
a fungus parasitic on skin, hair, or nails
Term
Characteristics of Chromoblastomycosis
Definition
: localized cutaneous or subcutaneous infection, tissue has rounded and sclerotic bodies (copper pennies)
Term
Organisms associated with Chromoblastomycosis
Definition
dematiacious molds
Term
Characteristics of Phaeohyphomycosis
Definition
cutaneous, subcutaneous or systemic, tissue is dark, with yeast-like cells with pseudo-hyphae-like elements
Term
Organisms associated with Phaeohyphomycosis
Definition
dematiacious mold
Term
Characteristics of Mycetoma
Definition
seen on hands and feet, chronic infection, tumor-like lesions, granular pass (mass of mycelia)
Term
Organisms associated with Mycetoma
Definition
Pseudoallescheria boydii, Acremonium spp. (white grain), Exophiala jeanselmei, Curvularia, and Madurella mycetomatis (black grain)
Term
Characteristics of Mucormycosis
Definition
vascular invasion, rapid thrombosis and necrosis of tissue
Organisms associated with Mucormycosis: Mucor spp.- zygomycetes
Term
The germ tube test
Definition
Identification of C. albicans within 3 hours via presence of germ-tubes (positive)
Term
Phenol Oxidase test
Definition
C. neoformans can produce phenol oxidase. Phenol oxidase can be reacted with phenylalanine and ferric citrate to oxidase diphenol to melanin which produces a brown/black color, C. albicans is negative
Term
Urease Test
Definition
used on respiratory specimens, rapid detection of C. neoformans (+) because this species can hydrolyze urea (using urease) to ammonia and carbon dioxide, which changes the indicator from yellow to pink, C. albicans will be negative
Term
C. albicans
Definition
germ tube positive, most frequently isolated etiologic agent,
Term
C. tropicalis
Definition
germ tube negative, blastoconidia off of pseudohyphae, sometimes seen at septa
Term
C. glabrata
Definition
germ tube negative, tiny, budding yeast, no pseudohyphae
Term
Cryptococcus neoformans
Definition
Urease positive, Phenol oxidase positive, lives in pigeon dropping, can cause meningitis, has a polysaccharide capsule, and on cornmeal produces blastoconidia only
Term
Rhodotorula spp
Definition
causes opportunistic endocarditis and fungemia, salmon colored and has a capsule, urease +
Term
What is the family/group of molds that produce aseptate hyphae?
Definition
Zygomycetes produce aseptate hyphae
Term
Zygomycetes
Definition
Rhizopus, Mucor and Absidia
Supporting users have an ad free experience!